Glue pot



` Julie 23, 192s. f 1,543,086

c. F. BAEHR GLUE Por Filed F'eb. 25, '1925 4 sheets-sheet 2 June 23, 192s.

C.F.BAEHR GLUE POT Filed Feb: 25, 1923 4 Sheets-Sheet 5 attorney:

June 23, 1925.

C. F. BAEHR GLUE Po'xl Filed Feb. 25, 1923 4 Sheets-Sheet `4- An-.970s Mica Mic Conf A l /Wnm K l Patented June 23, 1925.

UNITED STATES PATENT oFFlcE.)

CHRISTIAN?. Bm OF CLEVELAND, OHIO,`ASSIGNOB TO m VAN DOEN mmc Toor. comm, or emmen,

etna Por.

OHIO,

. Applicaties ma february as, .ma semi solenni- To all fwlurm.'v it mag convenu u Be it known that CHRISTIAN F'. Bama, a citizen f the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Glue Pots, of which the following is a specification.

This invention relates to glue pots and more particularly, to a portable glue pot structure comprising an outer, water containin vessel, a dglue containing vessel rel movab y mounte therein, and means for heating the glue.

One disadvantage of structures is the arrangement. of t e heating means, which is seldom held in heat conducting engagement with the bottom of the outer vessel, so that maximum heating e'ects are not obtained and the glue is not uniformly heated. In some glue pot structures, in which electrical means is emplo ed to heat the glue, a thermostatic contro is provided for maintaining the glue at the proper temperature, say between 140 and A- 150 Fahrenheit. In some instances, means 1s also provided for regulating the sensitiveness of the thermostatic control the regulating means being located outsi e of the structure, usually at a point remote from the thermostatic control. Assembly ofthese prior structures has, (therefore, been extremely difficult, and due to the diicult access to the heating neans and the thermostatic control, inspection and repair o these parts are inconvenient and expensive. It is therefore the ob'ect of the present invention to improve t e arrangement of the heating element b v the provision of a detachable base for t e' outer vessel, said 40. base having a yielding crowned portion which forces the heatin element into firm and uniformheat con ucting engagementV 4with the bottomof the outer vessel. Furthermore, by merely detaching the base, the heating element .is readily accessible'for inspection or repair, i A further object of the invention is to improve the arrangementof the lthermostatic control and the re latinga means therefor by arran 'ng sai devices in a diametricall)1 exten ing channel in the bot- L tom and wlthin 1the confines of the outer vessel, so-l that the thermostatic` control .is

such prior lue potl f the outer,

fully responsive to variations in temperature of the liqliliid in said vessel. Moreover, both the t ermostatic control and the regulating means therefor are closely associated at the p arting ofthe outer vessel and the base so t at se aration at this point renders both of said eviees readil accessible for inspection or repair. is arran ment also assists materially in the assem ly of the heating element and the control and regulating devices in the structure.V

`Further objects ofthe invention are inart obvious and in part will appear more 1n detail hereinafter.

In the drawings, which represent one suitable embodiment of my invention, Fig. 1 is a front elevation, parts being broken away to expose interlor parts; Fig. 2 is a' plan view of the outer vessel or container; Figs. 3 .and 4 are vertical'sectional views dthereof, taken at right angles to each other;

Fig'. 5 is a bottom plan view of the outer vessel; Fig. 6 is a vertical sectional kview of the removable base; Fig. -7 isa lan v iew thereof; Fig. 8 is a plan view o the heating element, parts being broken away for clearness of illustration; Fig. 9 is an edgeNiew thereof; and Fi 10 and 11 are detail.. views showin mo ied seating arrangements at the )unction of the outer vessel and base.

Referring to the drawings, 1 Vrepresents A water containing vessel or container having the usual chamber 2, which vessel may be of any suitable material, such as cast iron, and of any suitable shape,l

bein here shown as frusto-conical. The

is rovided in its bottom with a diametrica y disposed, upwardly extending channel shaped portion 3, open at the bottom of the vessel and closed at each end ly the side wall thereof, as indicated in 3, The bottom of said vessel is therefore divided into two substantially -semicircular heating element engagin portions 4 with a diametrically disposed c annel or recess 5 separating-them, in which chan'- nel is suitabl secured the thermostatic control later to be described.

)aSaid vessel is supported on adetachable y se crowned grid portion 6, an upwardly excomprising a l Yresilient convex or tending circumferential ange 7 within which the annularly recessed bottom of the outer vessel seats, and a depending, annular skirt ,portion 8 having circum erentially spaced feet portions 9 at its lower end, as indicated in Fig. 6. When the outer vessel 1s seated upon the flange 7, sufficient space is provide between the separated bottom portions et and the crowned id portion 6 for the heating element, which is ada ted to be yieldingly and uniformly held in eat conducting en ment with said bottom portions 4, as wi later appear. The base 1s firmly but detachably secured, to the outer vessel by screws 11 passing through the marginal rtion of the grid 6 and secured in circum erentially spaced lugs or bosses 12 formed in the bottom of said outer vsel. The skirt portion 8 of the base is preferably closed at the bottom by a circular protector plate 13, secured to lugs 14 on the inner sides of the feet 9, the plate providing a dead air heat insulating chamber 15 with ing the skirt portion.

e inner, glue containing vessel 16 is preferably' made of aluminum, and also frusto-conical in shape to corres nd to the outer vessel 1. This inner vesse is of such size that when it is secured within the outer vessel, as shown in Fig. 1, sufficient space is provided between the vessels, both at the side and bottom, forthe circulation of the water, indicated at 17, by means of which heat 'is transferred from the heating element to the glue within chamber 18, as is.

. usual.

The means for removably securing the inner vessel within the outer vessel comprise interlocking lugs on the upper, ad-

jacent sidewall portions of the two vessels, said lu constituting the well known bayonet loosconnections, and an annular, integ` ral fiange 19, extending outwardly and downwardly from the upper edge of the inner vessel and engaging and extending well beyond the upper end of the side wall of the outer vessel, as indicated in Fig. 1.

To securely hold the inner vessel against tilting movement, three sets of lugs are referably provided, each set comprising a orizontal, circumferentially er vessel, an a similarly extending lug 21 engaging therewith, each lug 21 being arranged on the lower end portion of a longitudinally extending vertical web member 22 on the. upper, outer wall surface of the inner vessel. To limit relative rotary movement of the two vesls, vided with a depending stop portion 20, which will be engaged bv the ends of lugs 2l as will be readily und .i

ly the provision of the integral fiange 19 for covering the space between the two vessels, all cracks or crevices through which extending lug 20 on the upper inner wall surface of the out- Awith the two parts of the each lug 20 is pro-l the glue might seep are avoided, and by extendi the flange downwardly and well beyon the side wall of the outer vessel, any glue which drips or splashes onto this flange will readily drain t erefrom and. fall beyond the structure.

Flange 19 is at diametrically opposed wardly extending, integral ears 23 having suitable apertures for receivin a bail or handle. member 24, by means'o which the glue pot structure may be readily carried. In the preferred embodiment of the invention, a portion of the handle is extended di` ametrically across the top of the inner vessel, as indicated in Fig. 1, to form a Ibrush wiper 25 for removin excess glue from the brush. By securing te handle to the inner vessel in the manner shown, either the entire structure, or the inner vessel alone, may be readily carried.

The heating element is in two parts each substantially corresponding in size an configuration `to the semi-circular bottom portions 4 of the outer vessel, and when ro erly arranged in the structure, un erlle these portions and are therefore separated by an intervening space underlying the channel 5. Each part comprises acore 26, of any insulating material, such as mica, and provided at its edges with op ed notches or recesses 27 for receiving t e turns of a resistance wire 28 wound therearound, as indicated in Fig. 8. The intervening spaces 29 between notches serve to insulate each stretch of wire from its adjacent stretches, the entire core of each part being insulated by inserting the same between two correspondingly shaped sheets of mica 30. The two parts of the heating element thus formed rest upon a substantially circular layer of asbestos 31, which in turn rests upon and overlies the resilient, crowned grid portion 6 of the base. fore mentioned, sufficient space is provided' for the heating element between said grid portion and the separatedbottom portions 4 of the outer vessel,-when the crown of said grid points, with uplportion is flattened, which flattening results y from the uniting of the base and the outer vessel. The heating element is therefore ieldi ly and uniformly preed into and eld in eat conducting engagement with the bottom of the outer vessel, so that maximum heating effects are obtained. Suitably connected in the electric circuit heating element isa thermostatic control for automatically maintaining the glue at the proper temperature, said control being arranged in channel 5, as before mentioned. The thermostatic control here shown comprises u per and lower contact members 32, 33, eac having one end horizontally arranged upon the opposits faces of an insulating block 34, se-

`provided at its upper edge,

' the water 17 rises and falls,

ymember 33 may be raised or lowered,l

`. tion, 1t is sufficient to sa cured by screws 35 to the lower face of a lug 36 depending from the middle of the channel shaped port-ion 3. Each of these Contact members is provided at its free endl with a suitable contact 37, arranged to cooperate with each other in making and breaking the electric circuit. The up r Contact member 32 is a bimetallic mem r fully responsive to the heat condi-tion at the bottom of the outer vessel, so that the contact 37 of this member will be automatically' raised and lowered, as the temperature of thereby openi-ng 0r closing the electric circuit through the heating element.

Suitable means is provided for varying the distance through which the upper contact 37 must be moved to make or reakthe electric circuit, the means here shown comprising a rotatable adjustable member 38 of screw form. The head 38 thereof is supported in an opening 39 in the side wall of the outer vessel, near the lineof attachment of said vessel and the removable base, head being readily accessible in said opening from outside the structure. The shank or body portion of said screw extends inwardly into channel 5, being suitably supported therein by a lug 40 depending from and extending across said channel, as indicated in Fig. 1. The inner tapered end 38 of the screw is adapted to engage the beveled front end of an insulating block 41 suitably secured to the bottom face of the lower contact member 33. By turning the head 38 of this regulating screw, the lower 'contact thereby varying the distance through which the contact- 37 of the upper contact member 32 must be moved to make or break the electric circuit. y j By thus arranging the thermostatic control and the regulating member therefor within channel 5 and adjacent the line of attachment of the outer vessel and the removable base, the entire structure may be easily and quickly assembled, and inspection or repair of these parts readily and convenient y made. In the preferred vention, a pilot lam electric circuit, whic will, of course, be illuminated when the current is on. vIn the present illustration, said lamp is mounted in the skirt portion Y8 of the removable base, as 'indicated in Fig. 1. A suitable cable or cord 43 for supplying current to the device embodiment of the inalso passes through said.- skirt portion, as

indicated.v u

Any suitable wiring may be em loyed in connecting the heating element and? the thermostatic control in the circuit, and since the wiring forms no special part of the invenarrangement may be emp oyed, it only being able base for preventing creeping of 42 is included in the that any wiring` necessary to be sure that the thermostatic control can make and'break the electric circuit including the heating element.

` In the preferred vention, suitable means is providedat the junction of the outer vessel and theremolvt e glue, such as by gravitation or the like, into the space between said vessel vand base and onto the heating element arranged therebetween. In Figs. 10 and 11, the outervessel and base are provided with interengaging flanges, with the flange of the outer vessel outside of the flange of the base and Vextending below the top of the same. While the flange-ofthe outer vessel is here shown as extending within the periphery of the base, it might obviously be formed as extending outside thereof and below the' top of the base, whereby sloppage of glue would be directed sel and ase. In Fig. 11, the bottom or lower face of the flange ofthe outer vessel, which is fformed by an annular recess, is in the plane of thebottom of the vessel, so that said bottom may be machined in constructingsaid vessel, the construction thereof be-- ing thereby materially facilitated. l

vSuitable means is also provided in the preferred'embodiment of my invention for effectivel preventing the escape of steam or water rom the space or chamber between the innerand outer vessels. The means here. shown comprises an annular ring or flange 19a depending from the lower face of the shedding flange locatedadjacent the side wall of the outer vessel. As shown, flange 19 is formed integral with flange 19 and the web members 22 of the inner vessel. As indicated in Fig.

embodiment of myinl ast the junction of the outer ves- 19. of the inner vessel and of the side wall of they outer vessel, which is the point of engagement of vessel 1 and outwardly extending flange 19, so that steam rising to the vtop of the space or chamber between the two vessels, or water splashing to this point, is directed down past said point of engagement and is, therefore, effectively prevented from escaping. j

Having described my invention, I claim: 1. A glue pot structure, comprising a container, a heating element, and a detachable base for supporting said container and said heating element, said base being provided with means for yieldingly pressing said heating element into heat conducting enlll 3, A glue pot structure, comprising a container, a heating element, and a detachable base for supporting said container and said' heating element; a portion of said base being crowned so as to yieldingly and uniformly press said heating element into heat conducting engagement with the bottom o said container.

4. A glue pot structure, comprising a container, a heating element, and a detachable base for supporting said container and said heating element, said base being cast in one piece and including a crowned portion for yieldingly and uniformly pressing said heating element into heat transferring relation with the bottom of said container.

5. A glue pot structure, comprising a container having a diametrically disposed channel extending upwardly into the container and separating the bottom thereof into two substantially semi-circular heating element engaging portions,'a base adapted to be secured to the bottomof said container, a heating element comprising, two parts, one for cach separated bottom portion of the container, said heating element parts being held against their corresponding container bottom ortions by said base, and a lcontroller or said heatingelement arranged in said channel.

G. Aglue pot structure, comprising a container, a base removably secured thereto, a heating element, a thermostatic control located between said container and said base, and regulating-means for said thermostatic control accessible from a point outside the side wallof said structure and adjacent the line of separation of said container and said base.

7. A glue pot structure, comprising a container, a base removably secured thereto, a heating element, a thermostatic control located between said container and said base, and regulating means` for said thermostatic control accessible from the outside at a point tially the plane of the adjacent the line of separation of said container and said base, Vand terminating within the periphery of said container.

8. A heating device, comprising a container, a base removably secured thereto, said container and base arting in substantially theV plane of the ottom of the container, said container and base having chambers adjacent their junction, a heating element arranged in one of said chambers. and a controller and regulator in other of said chambers, whereby said heating element and said controller and regulator are accessible when said container and said base are separated. A

9. A heating device, comprising a container, a base removably secured thereto, said container and base parting in substanbottom of the container, said container being provided with a channel and said basebeingxprovided With a heating element chamber, th said channel and said chamber being adjacent the junction of said container and base, a heating element arranged in ythe chamber of said base, and a controller arranged in said channel.

10. A heating device, comprising a container, a base removably secured thereto, said container and base arting in substantially the lane of the I ttom` of the container, said) container being provided with a channel and said base being provided with a heating element chamber, both said channel and said chamber being adjacent the junction of said container and basea heating element arranged in the chamber of.

said base, and a controller and a regulator arranged in said channel, whereby said heating element and said controller and said regulator are accessible when said container and saidbase are separated. l

In testimony whereof I herebyy aix my signature. CHRISTIAN F. BAEHR. 

